JPH0734916A - Gear shift control system of engine for vehicle - Google Patents

Abstract

PURPOSE:To provide a gear shift control system of engine for vehicle which eliminates a necessity of operation of a clutch device and a throttle (accelerator) at the time of gear change. CONSTITUTION:In a vehicle provided with a manual transmission device, a gear shift control system 38 of an engine for vehicle consists of a means 30 which senses degree of opening of a throttle (accelerator) 24, a means 31 which senses the operation of a clutch device, a means 17 which senses the operation of a shift device 15, a controller 39 which processes the sensed degree of opening and operation information, an actuator 13 whose operation is controlled by the controller 39, and a fuel carburetion means 6 connected to the actuator 13 so that flow rate of mixture to be supplied to the engine is regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift control system for a vehicle engine, and more particularly to a shift control system for a vehicle engine which does not require operation of a clutch mechanism or a throttle (accelerator) during shifting.

[0002]

2. Description of the Related Art Automobiles and motorcycles are equipped with a transmission mechanism that appropriately decelerates the rotation of an engine to increase torque or switches to high-speed rotation according to the running state of the vehicle. The transmission mechanism is generally installed between a clutch mechanism that interrupts the rotational force of the engine and a drive device such as a wheel. In particular, a manual operation (foot movement in a motorcycle) is used to operate the transmission mechanism. It is called the transmission mechanism.

In the manual transmission mechanism, a main shaft to which torque from the engine is transmitted,
It is composed of a counter shaft for transmitting torque to the drive device and a plurality of gears provided on each shaft. The gear ratio is changed by operating the shift mechanism to change the gear combination. This operation is generally referred to as shifting or gear change.

Next, a shift operation of the transmission mechanism, that is, a gear change will be described. Since the engine torque is applied to the gear provided on the main shaft, if the gears provided on the counter shaft are rearranged and meshed in this state, it is difficult to change the gear or the gear is damaged. Therefore, the clutch mechanism is disengaged, the engine torque applied to the gear of the main shaft is once removed, the gear is changed, and then the clutch mechanism is connected again to transmit the engine torque to the drive device.

[0005]

However, for example, if the clutch mechanism is disengaged with the throttle (accelerator) opened (accelerating), the engine becomes unloaded at that moment and the engine speed increases too much, which is preferable. Since there is no such thing, the throttle (accelerator) must be closed for a moment when the clutch mechanism is disengaged. On the other hand, when the throttle (accelerator) is closed (during deceleration), once the clutch mechanism is disengaged, the gear change is performed, and the clutch mechanism is reconnected, the engine speed is lower than that of the drive unit.
When the gears in the transmission mechanism mesh, the deceleration torque of the engine locks the drive unit, so the throttle (accelerator) is momentarily opened and the engine speed and drive unit speed (main shaft and counter shaft) are set. The clutch mechanism must be connected in synchronism.

However, in the case of a competition such as a race for 1/100 seconds, the operation of the clutch mechanism and the throttle (accelerator) described above causes a delay in acceleration and deceleration, resulting in a loss of time.

Further, when gear changes are frequently made, such as in a place where corners are continuous, the operation of the above-mentioned clutch mechanism and throttle (accelerator) distracts the concentration, which is not preferable.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a shift control system for a vehicle engine that does not require operation of a clutch mechanism or a throttle (accelerator) at the time of gear change.

[0009]

In order to solve the above-mentioned problems, a shift control system for a vehicle engine according to the present invention, as described in claim 1, is a vehicle equipped with a manual transmission mechanism. (Accelerator) opening degree sensing means, clutch mechanism actuation sensing means, shift mechanism actuation sensing means, a controller for processing the sensed opening degree and actuation information, and this control It is composed of an actuator whose operation is controlled by the device and fuel vaporization means connected to this actuator, and regulates the flow rate of the air-fuel mixture supplied to the engine.

[0010]

According to the present invention having the above-described structure, in a vehicle equipped with a manual transmission mechanism, a means for detecting the opening of the throttle (accelerator), a means for detecting the operation of the clutch mechanism, and an operation of the shift mechanism are provided. It is composed of a sensing means, a control device for processing the sensed opening and operation information, an actuator whose operation is controlled by the control device, and a fuel vaporization means connected to the actuator, and supplies it to the engine. Since the flow rate of the air-fuel mixture is regulated, it is not necessary to operate the clutch mechanism or the throttle (accelerator) when changing gears.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a left side view showing an example of a motorcycle to which the present invention is applied, and FIG. 2 is a plan view of the motorcycle.

1 and 2, the motorcycle 1 has a body frame 2. A fuel tank 3 is provided above the vehicle body frame 2, and the vehicle body frame 2
An engine 4 is mounted in the lower center part of the. Engine 4
Is composed of a cylinder portion 4a and a case portion 4b, and an exhaust pipe 5 constituting an engine exhaust system is connected to the front side of the cylinder portion 4a. Further, a carburetor 6 which is a fuel vaporizing means constituting an engine intake system is connected to the rear side of the cylinder portion 4a.

As shown in FIG. 3, the carburetor 6 adjusts the flow rates of air and fuel by the piston valve 8 moving up and down in the intake passage 7 and the jet needle 10 moving up and down in the needle jet 9. is there. The piston valve 8 and the jet needle 10 are constantly pressed by the spring 11 toward the lower side of the drawing, and the intake passage 7
While the needle jet 9 is closed, the throttle cable 12 connected to the upper portion of the piston valve 8 is pulled to open the intake passage 7 and the needle jet 9. Throttle cable 1
2 is connected to an actuator 13 installed in the lower part of the fuel tank 3, for example.

On the other hand, although not shown in detail, a manual transmission mechanism 14 is provided inside the rear portion of the case portion 4b, and a shift mechanism 15 for operating the transmission mechanism 14 is provided at the left rear end portion of the case portion 4b. A shift pedal 16 is provided as an initial shift operation member. The transmission mechanism 14 is adapted to change the gears of the transmission mechanism 14 (change the gear ratio, hereinafter referred to as gear change) by stepping down or lifting the shift pedal 16 with the tip of a foot, for example. The operation of the shift pedal 16 is detected by a shift pedal interlocking switch 17 which is a means for detecting the operation of the shift mechanism 15 connected to the shift pedal 16.

A clutch mechanism 18 is provided on the rear left side of the case portion 4b of the engine 4, and the rotation of the engine 4 is interrupted by the transmission mechanism 14 by operating a clutch lever described later.

A head pipe 1 is provided in front of the body frame 2.
9 is provided, and a steering mechanism 20 is provided on the head pipe 19. The steering mechanism 20 includes a front fork 2 that rotatably supports a front wheel 21.
2, the handlebar 23, etc. are provided, and the head pipe 19
It is pivotally attached to the left and right.

At the right end of the handlebar 23 in the vehicle body traveling direction is a means for opening and closing the throttle 24 for controlling the rotational speed of the engine 4. A throttle grip 25 as an initial throttle opening / closing member is provided, and the front of the throttle grip 25 is provided. A front brake lever 26 is provided in the. A left grip 27 is provided at the left end of the handlebar 23 in the vehicle body traveling direction.
Is a means for connecting and disconnecting the clutch mechanism 18 in front of
A clutch lever 28 as an initial clutch operating member is provided, and for example, a clutch cable 29 is used to connect the clutch mechanism 1
8 is connected.

At the base of the throttle grip 25, there is provided a throttle opening sensor 30 which is means for detecting the opening of the throttle (accelerator) 24. A clutch sensor 31, which is a means for detecting the operation of the clutch mechanism 18, is provided at the base of the clutch lever 28.

On the other hand, a swing arm 34, which rotatably supports a rear wheel 33, is pivotally mounted on a pivot shaft 32 which is provided at the lower center of the body frame 2 so as to be swingable around the pivot shaft 32. Footrest brackets 35R and 35L are provided behind the pivot shaft 32 on the left and right of the vehicle body, respectively.
Footrests 36R and 36L are provided on 35L.
Reference numeral 37 is a rear brake pedal.

FIG. 4 is a connection diagram of the shift control system 38 for a vehicle engine according to the present invention.

As shown in FIG. 4, the shift pedal interlocking switch 17, the throttle opening sensor 30, and the clutch sensor 31 described above are a control box 39 which is a control device for processing the opening and operation information sensed by these. Connected to. The actuator 13 is also connected to the control box 39, and the operating amount and operating direction of the actuator 13, that is, the pulling amount and pulling direction of the throttle cable 12 are controlled. The control box 39 is installed, for example, in a portion such as the lower portion of the fuel tank 3 which is not covered with water or dust.

Next, the control setting and operation of the control box 39 will be described.

In the normal state (stopped and running), the opening / closing information of the throttle 24 operated when the gear change is not performed is the same as that of the actuator 13.
And the piston valve 8 is moved up and down according to the opening degree of the throttle 24.

In a normal state, the clutch lever 28
When the clutch sensor 31 senses that the clutch mechanism 18 is operated by operating the control box 3,
9 determines that a normal gear change operation is performed,
The opening / closing information of the throttle 24 operated at this time is directly transmitted to the actuator 13, and the piston valve 8 is moved up and down according to the opening degree of the throttle 24.

When the throttle 24 is open (during acceleration) during traveling and the operation of the clutch mechanism 18 is not recognized, the shift pedal 16 shifts up (rear wheel 33).
When the gears are rearranged to increase the number of rotations), the operation of the shift pedal 16 is detected by the shift pedal interlocking switch 17, and the control box 39 sends the throttle cable 12 to the actuator 13 based on the operation information. , For example, the throttle opening at that time is 20
Instruct to return the amount corresponding to% for several tens of mm seconds. When the throttle cable 12 is returned, the piston valve 8
Also, the jet needle 10 works in conjunction to reduce the flow rate of air and fuel, for example, the 20% amount immediately before that for several tens of mm seconds. When the flow rates of air and fuel are reduced, the rotation speed of the engine 4 is reduced at that moment, and the transmission mechanism 1
The torque of the engine 4 applied to the gear No. 4 is released, the same state as when the clutch mechanism 18 is disengaged, and the gear change can be performed.

On the other hand, when the throttle 24 is closed (during deceleration) during traveling and the operation of the clutch mechanism 18 is not recognized, the shift pedal 16 shifts down (shifts the gear to a ratio that reduces the rotational speed of the rear wheel 33). When the rearrangement operation is performed), the operation of the shift pedal 16 is detected by the shift pedal interlocking switch 17, and based on this operation information, the control box 39 causes the actuator 13 to connect the throttle cable 12 to, for example, the throttle opening at that time. Instruct to pull the amount corresponding to 20% for several tens of mm seconds. When the throttle cable 12 is pulled, the piston valve 8 and the jet needle 10 work together to increase the flow rate of air and fuel, for example, the 20% amount immediately before that, for several tens of mm seconds. When the flow rates of air and fuel are increased, the rotation speed of the engine 4 is increased at that moment, the deceleration torque of the engine 4 applied to the gear of the transmission mechanism 14 is released, and the state becomes the same as when the clutch mechanism 18 is disengaged. It becomes possible to do. Further, since the rotation speed of the engine 4 increases and is synchronized with the rotation speed of the rear wheel 33, the rear wheel 33 is prevented from being locked when the gears in the transmission mechanism 14 mesh with each other.

As described above, according to the present invention, a series of operations at the time of a gear change which has been conventionally performed, that is, the connection and disconnection of the clutch mechanism 18 and the opening and closing of the throttle 24 are automatically performed only by the operation of the shift pedal 16. Can be done quickly. Therefore, there is no delay in acceleration or deceleration. In addition, the clutch mechanism 18 and the throttle 24 can be used even when gear changes are frequently made such as where corners are continuous.
Since it is not necessary to operate, you can concentrate on driving.

Further, the throttle 24 is a carburetor 6
Since it is indirectly connected to the throttle 24, the operating force of the throttle 24 can be greatly reduced by merely operating the throttle opening sensor 30, and the operating force of the throttle 24 can be arbitrarily set. Further, the opening degree of the throttle 24 can be set arbitrarily.

In the above-described embodiment, the piston valve 8 of the carburetor 6 having the piston valve 8 is operated by the actuator 13, but the carburetor having the throttle valve is used to drive the throttle valve to the actuator. You may open and close by 13.

Further, in the above embodiment, the shift control system 38 of the vehicle engine is applied to the motorcycle 1, but the invention can also be applied to a motorcycle or a four-wheeled vehicle equipped with a manual transmission mechanism.

FIG. 5 shows an example in which a shift control system for a vehicle engine is applied to an automobile.

An accelerator opening sensor 102, which is a means for opening and closing an accelerator for controlling the engine speed and a means for detecting the opening of a throttle (accelerator), is provided at the base of an accelerator pedal 101 as an initial accelerator opening / closing member. It is provided. Further, there is a means for connecting and disconnecting the clutch mechanism, and the clutch pedal 10 as an initial clutch operating member.
A clutch sensor 104, which is a means for detecting the operation of the clutch mechanism, is provided at the base of No. 3. Further, a shift lever interlocking switch 106, which is a means for sensing the operation of the shift mechanism, is provided at the base of the shift lever 105, which is a shift mechanism for operating the transmission mechanism and serves as an initial shift operation member.

The accelerator opening sensor 102, the clutch sensor 104, and the shift lever interlocking switch 106 are
It is connected to a control box 107 which is a control device for processing the opening and operation information sensed by these.
Further, the actuator 110 to which the throttle cable 109 for opening and closing a throttle valve (not shown) in the carburetor 108 is connected is also the control box 1.
07, the operation amount of the actuator 110, that is, the opening / closing amount of the throttle valve is controlled.

The operation of the shift control system for a vehicle engine applied to this automobile is the same as that of the shift control system 38 for a vehicle engine applied to the motorcycle 1, and therefore its explanation is omitted.

The above-described embodiment shows an example in which the shift control system 38 is applied to the carburetor 6, but it is also applicable to a fuel injection device.

In the above embodiment, the throttle opening sensor 30 is provided at the base of the throttle grip 25, and the clutch sensor 31 is provided at the base of the clutch lever 28. Since sensors 30 and 31 can be provided in the middle of the clutch cable so as to interlock with the cables, they can be easily retrofitted to conventional models.

[0038]

As described above, according to the shift control system for a vehicle engine according to the present invention, in a vehicle having a manual transmission mechanism, a means for sensing the opening degree of a throttle (accelerator) and a clutch mechanism. For detecting the operation of the shift mechanism, a means for detecting the operation of the shift mechanism, a controller for processing the detected opening and operation information, an actuator whose operation is controlled by the controller, and a controller connected to the actuator. Since the flow rate of the air-fuel mixture supplied to the engine is regulated, the operation of the clutch mechanism and the throttle (accelerator) becomes unnecessary when the gear is changed.

[Brief description of drawings]

FIG. 1 is a left side view of a motorcycle showing an embodiment of a shift control system for a vehicle engine according to the present invention.

FIG. 2 is a plan view of the motorcycle shown in FIG.

FIG. 3 is a vertical cross-sectional view showing the structure of a carburetor.

FIG. 4 is a connection diagram of a shift control system for a vehicle engine.

FIG. 5 is a connection diagram showing an example in which a vehicle engine shift control system according to the present invention is applied to an automobile.

[Explanation of symbols]

1 Motorcycle 2 Body Frame 4 Engine 6,108 Carburetor (Fuel Vaporizing Means) 8 Piston Valve 10 Jet Needle 12,109 Throttle Cable 13,110 Actuator 14 Manual Transmission Mechanism 15 Shift Mechanism 16 Shift Pedal (Initial Shift Operating Member) 17 Shift Pedal interlock switch (means for detecting the operation of the shift mechanism) 18 Clutch mechanism 24 Throttle (means for controlling the engine speed) 25 Throttle grip (means for opening / closing the throttle, initial throttle opening / closing member) 28 Clutch lever (for clutch mechanism) Means for connecting and disconnecting, initial operation clutch operating member) 30 Throttle opening sensor (means for detecting throttle opening) 31 Clutch sensor (means for detecting operation of clutch mechanism) 38 Shift control system for vehicle engine 39, 107 Control box (control device for processing sensed opening and operation information) 101 Accelerator pedal (means for opening and closing accelerator, initial accelerator opening / closing member) 102 Accelerator position sensor (accelerator opening) (Means for detecting the opening) 103 clutch pedal (means for engaging and disengaging the clutch mechanism, initial movement clutch operating member) 104 clutch sensor (means for detecting operation of the clutch mechanism) 105 shift lever (initial movement operating member) 106 shift lever interlocking switch (Means for detecting the operation of the shift mechanism)

Claims (1)

[Claims] 1. In a vehicle having a manual transmission mechanism, a means for detecting the opening of a throttle (accelerator), a means for detecting the operation of a clutch mechanism,
It is composed of a means for sensing the operation of the shift mechanism, a control device for processing the sensed opening and operation information, an actuator whose operation is controlled by the control device, and a fuel vaporizing means connected to the actuator. However, the shift control system for a vehicle engine is characterized in that the flow rate of the air-fuel mixture supplied to the engine is regulated.